Bernau is in Barnim county to the northeast of Berlin (approx. 20,000 inhabitants). The flag is green-white-red with the arms in the white stripe. Source: Günther 1995 (Erwin Günther, Ostdeutsche Stadtflaggen (1): Land Brandenburg, in Der Flaggenkurier, no. 1, 1995).

The arms are based on the oldest seal of the city, known since 1347. The eagle is the eagle of Brandenburg, the bear is canting. The tree originally was a linden tree and is either a symbol of justice, or for the forests in the area.